An extreme case of Turtle Head, in which the victim is forced to take sliding baby steps and clench their butt cheeks in order to avoid a full on pant's crapping episode.

You suddenly realize you have turtle head. You leave your desk and take several steps towards the restroom only to experience the second stage of Turtle Head called, "Walking Tortoise Head". You clench your butt cheeks together and make baby steps praying for the strength and the luck to make it to the toilet in time to release this angry monster.